package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.conditions.query.QueryChainWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.security.SecureRandom;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Autowired
    private RedisTemplate<Object, Object> redisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //验证手机号是否符合规范
        if (RegexUtils.isPhoneInvalid(phone)) {
            //不合规,报错
            return Result.fail("手机号规格不对");
        }
        //生成验证码
        String random = RandomUtil.randomNumbers(6);
//        //保存验证码到session
//        session.setAttribute("code",random);
        //保存验证码到Redis | set key value 1 minutes
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,random,LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //发布验证码到客户端
        //只传输日志,未发送到客户端
         log.info("发布验证码成功,code:{}",random);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            //不合规,报错
            return Result.fail("手机号规格不对");
        }
        //2.从redis中取验证码并校验
        String cachecode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
        String code = loginForm.getCode();
        if (cachecode == null || !cachecode.equals(code)){
            //3.不一致,报错
            return Result.fail("验证码错误!");
        }
        //4.一致,查询用户
        User userWrapper = query().eq("phone",phone).one();
        //5.判断用户是否存在
        if (userWrapper == null) {
            //6.用户不存在,创建新用户并保存
            userWrapper = createUserWithphone(phone);
        }
        //7.保存用户信息到redis
        //7.1.随机生成token,作为用户令牌
        String token = UUID.randomUUID().toString();
        //7.2.将User对象转为HashMap存储
        UserDTO userDTO = BeanUtil.copyProperties(userWrapper, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName,fieldValue) -> fieldValue.toString()));
        //7.3.存储到redis
        String key = LOGIN_USER_KEY+token;
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token,userMap);

        //7.4.设置token有效期
        stringRedisTemplate.expire(key,LOGIN_USER_TTL,TimeUnit.MINUTES);
        System.out.println("token:"+token);
        //7.5.返回token
        return Result.ok(token);
    }

    private User createUserWithphone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
